1. Department of Electrical and Computer Engineering, Northeastern University, Boston, MA, USA
2. Klipsch School of Electrical and Computer Engineering, New Mexico State University, Las Cruces, NM, USA
3. Departamento de Ingeniería Telemática, Universidad Carlos III de Madrid, Madrid, Spain
4. Dipartimento di Automatica e Informatica, Politecnico di Torino, Torino, Italy